Power tool for removing old putty



APT i5, 1940- R. J. DEMERs 2,197,207

PWER TOOL FOR REMOVING OLDYPUTTY Filed July 12, 1935 wiivrw-m l' j l 1 1 l l 4 e 4o 48 6o 4l 5 G P i Patented Apr. 16, 1940` RenefJ.V Demers, Lawrence,' Mass. y Application July 12, 1935, Serial No.` 31,7016 v 1o claims. (cl. 90-12) This invention is a powerdriven tool especially adapted for removing the old and hardened putty when it is desired to remove theglass from a Window sash.

Putty, which is almost universally used in tightly holding window glass in a sash, is usually on the outside, and gets veryhard with time. Its' exposed face is usually at an angle with the glass and with the adjoining sash, andthe, together` lo with the fact that it sticks veryv closely to the wood of the sash, makes the operation of removing the putty with a hand tool, such as a chisel, not only very slow butthe sash itself'is cut and marred.

l It is practically impossible to make a perfect t between the glass and the sash, and` there are certain places between the edge of the glass and the vsash into which the puttyvpenetrates and be# comes hard. If the rst pane is broken and is g@ removed, these edge deposits of putty must be carefully removed because the next pane will not be exactly the same size and shape, andthe removing ofthese small edge deposits. is very troublesome with a hand tool. v 'i g5 As glass wedges to t the pane of glass in the sashrabbets and lthin metal triangles to help hold 'the pane to the sash are voften used, the

putty cutting member must be capable of cutting' metal and breaking glass wedgeS if necessary.v` g :iol This device is a small and compact hand tool which includes a power driven circular cutting orgrinding member, preferably a metal cutting circular saw which is so positioned that it projects a dierent distance from each of-two ad- 351 joining at faces so that the lesser projectioncan cut the putty down to the glass, and after the glass is removed, by merely turning the tool, the greater projection of the saw can cut out this troublesome edge deposit of putty, leaving the .mf rah-bet .of the sash clean and free from putty its entire depth except for a short distance from each corner. l

Preferably the cutting member also projects a short distance beyond theadjoining edge between y 45 the twol guide faces, and preferably there is a direction guide which projects from each guide face on the other side of the cutting member from the adjoining edge.

r -This device is so convenient and easily oper.-

moved from a window without removing' the sash vfrom the window frame. -The tool is vso compact .and so thin .that its 55,t depth guide will t between thevedge of the `sash Yated that a pane of old glass can readily be reandjthe frame and it can be held, turned and fullyvcontrolled in one hand. l

In the drawing, Fig. 1 isa vertical cross-sectionof a window sash as on'the line I-I of Fig. 3,'showingfthe'too1, not in section, vas a 'cut is 5 started. f" y Fig. 2 is a view similar to Fig. 1 except that the sash at the left is shown on the line 2-2 of Fig. 3 and at the right on the linel I-I, some parts being broken away for clearness.

Fig; 3. is avertical cross-section as on the line 3 3 'of Fig. 2, parts ofthe tool being shown iny section and other parts in full lines. v

` Fig. 4 is a fragmentary view similar' to Figs. 1 and 2 butafter the glass has been removed and 15` with the deepfcuttingedge of the saw in action.

Fig. isa vertical sectional view as on the line 5*'-5'o'f 1ig..fl. l

Fig. 6 is a view similar to partA of Fig. 1 of a modification showing the angles between `the depth guide'faces as acute.

Fig. 7 is a view similar to Fig. 5 of a thick vsaw in place of a thin saw.v

In the drawing, W lis a window frame of any standard type in which, as shown, isa sash S in which is la right angular rabbet 4 which extends all the way around.

6I-of the glass G. PuttyP includes the narrow 35 edge depositi? of varying widths, but of the thickness-of' the glass, vthe part 'I above 8 `which is to be cut away-andthetriangular part 4'I which remains and which is removed with the glass G.

'I'he tool-is housed in a casing C Whichincludes 40 a motor casing I4 for the motor M, and a chain and saw housing I9, as well as a back cover plate 29 whichpreferably has air ventilators 21. vThe parts of .the casing C are held together by bolts such as 26, and Vscrews I8, so that they can be quickly assembled andk disassembled.

. The motor M is preferably of the electrical type and.4 current is supplied as by a exible wire cord" 2,- there beingalso preferablyv a convenient switch I to close and open the'circuit. v l* I2 is the motorr shaft to which a drive' sprocket 9 is keyed as by. a -key `5Fl-,and I'I isa stud which carries a driven sprocket I Il which Aisfree to r0-` tatethereon and whichmaybeof any size according4 to the power and'speeddesired. Q30 and 55 33 are collars which hold this sprocket, and the saw A carried by sprocket III revolubly in place on stud I'I.

3l is a transmission chain from drive sprocket 9 to driven sprocket I0.

Stud I'I is positioned nearer to the at depth guide face 6 than to the flat depth guide face IS of the casing C and is also a dierent radial distance from their adjoining edge 36 so that the depth of a saw cut can be regulated by tilting the tool.

5 and l5 are fiat direction guides, each of. which is in line with the saw and each of which projects from a different face 6l or IG, and each of which may be of a different length and depth. These are preferably of about the same thickness as the cutting part of the saw so that after a cut has been once started, each will guide the saw along the side 40 of the rabbet 4.

The saw A and the direction guides 5 and I5 are preferably near the middle of the depth guide faces 5 and I6 or, in any event, are far enough away from the side edges so that there is sufficient space on each side for part of the depth guide face 6 or I6 to rest smoothly on part of the face I3 of a sash such as S to keep the tool steady and the saw at right angles to face I3.

As shown in Fig. 6, the stud 50 or other device for carrying the saw, such as 5I, can be a different distance from the depth guide face 52, than from depth guide face 53, and it may not project from the adjoining edge 54 and the direction guides5 and I5 can be omitted entirely.

In using the device, it is often desirable, `as shown in Fig. 1, to carefully start the cut near thecorner by tilting the tool and then, as shown in Fig. 2, after a cut of suicient length has been made, to turn the tool so that-the shallow direction guide 5 will follow the cut and keep the saw accurately on the line. After the first cut on all four sides, what little putty 43 remains at the corner can easily be removed and the glass with putty 4l can then be removed,rafter which the cutting process is repeated with the edge of the saw which projects the greater distance from face I6, using the direction guide I5 to keep it true, as shown in Figs. 4 and 5.

By having the depth guide faces 6 and I6, all the putty can be removed with no adjustment. n

The circular cutting or grinding member, which is preferably a metal cutting disk but might be an emery wheel, can be of any desired thickness such as one-sixteenth or one-eighth of an inch, as shown at F in Fig. 7, but its teeth should not project like a wood saw-and the direction guides should be the same thickness or a triiie thinner than the saw itself.L

As shown in Fig. 6, the depth guide faces need not be at right angles or perpendicular to each other. Preferably the depth guide faces are at a right or acute angle with each other as this allows the operator to see where he is cutting.

I can use a thin saw such as A, Figs. 1,2, 3, 4, 5, which not only leaves a part lI'I of putty P to be removed with the glass, but leaves a part 49 of the edge deposit 8, as shown in Figs. 4 and 5, to be removedby hand, or I can use a thicker saw such as F in Fig. 7, which is wider than 8 `and removes it entirely.

I claim:

l. In a sash putty cutting tool, the combination of a casing having two adjoining flat depth guide faces which are substantially perpendicular to each other; a circular saw which is so journaled in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face and a third distance from their adjoining edge; a motor in the casing for driving the saw; and direction guides, each of which is in line with the saw and projects from a different depth guide face.

2. In a sash putty cutting tool, the combination of a casing having two adjoining iixed fiat depth guide' faces which are substantially perpendicular to each other; a circular saw which is so journaled in bearings fixed in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face; and a motor in the casing for driving the saw.

3. In a sash putty cutting tool, the combination of a casing having two fixed flat depth guide faces; a circular cutting member which is so journaled in bearings fixed in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face; and means forfdriving the saw.

4. In a sash putty cutting tool, the combinationyof a casing having two adjoining fixed flat depth guide faces at an acute angle with each other; with a circular cutting member which is so journaled in bearings xed in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face; a motor in the casing for driving the saw; and direction guides, each of which is in line with the saw and projects from a different depth guide face.

5. In a sash putty cutting tool, the combination of a casing having two adjoining xed flat depth guide faces; with a circular cutting member which is so journaled in bearings xed in the casing that'l its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face; means in the casing for driving the saw; and direction guides, each of which is in line with the saw and projects from a different depth guide face.

6. In a sash putty cutting tool, the combination of a casing having two xed fiat depth guide faces which extend at angles with each other; with-a circular cutting member which is so journaled in bearings xed in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face; and means for driving the saw.

'7. Aportable electric sash putty cutting tool comprising a housing provided at its front with a downwardly inclined fixed fiat depth guide face and at its bottom a flat xed depth guide face at an angle therewith, a circular saw journaled in iixed bearings in the housing and projecting different distances from the two fiat fixed depth guide faces, and a controllable electrically'operated driving mechanism operatively connected with the saw for driving it.

8. In a sash putty cutting tool, the combination of a casing having two adjoining flat depth guide faces which are substantially perpendicular to each other; a circular saw which is so journaled in the casing that its cutting edge projects perpendicularly different radial distances from proximate the middle of each guide face and a third distance from their adjoiningv edge;

an electric motor in the casing for driving the` saw; and a switch on the outside of the casing for starting and stopping the motor.

9. In a sash putty cutting tool, the combinamajor depth guides, both lying in the same plane v parallel with the axis of the saw and on each side thereof, and two minor depth guides, each lying in the same-plane on each side of the lsaw and parallel with theaxis but at a less distance therefrom than the major depth guides, the planes of the major land minor depth guides being at an angle with each otherand approachim;l each other-at a line on` the opposite'corner of the casing from the switch.

10.v In a sash putty cutting tool, thetcombination of a casing'having two adjoiningflat depth guide faces which are substantially perpendicular to each other; a circular saw which is so journaled in the casing that its cutting edge projects perpendioularly different radial distances from proximate the'middle of eachguide face and a third distance from their adjoining edge; a motor in the casing for driving the saw; and a direction guide which is in line with the saw and'which projects kfrom a depth guide face.

RENE J. DEMERS. 

